You are right about dysphoria, but it used to be seen, correctly, as a form of mental illness. Whereas now, it has met up with the fashionable academic idea that gender is “fluid”, and that there are not two genders, but many, self-created ones. This is actually taught to social workers, etc. So dysphoria has become the basis for a legitimate identity.
The sick ideology of a decadent society. Anyway, the backlash is coming.
Insisting on using the right words would help. Gender is a construct — i.e. it’s all in the mind. Therefore, it can be fluid, and there can be any number of genders you care to imagine. OTOH, sex is biological, fixed, and binary.
If someone tells you “there are many genders”; don’t argue. Instead say something like: “O.K, but, there are only two sexes, and you can’t change them”. Otherwise, you’re falling into a trap.
Two things... First off, gender dysphoria is in the DSM. It is a recognized disorder. But it is one where it has great difficulty in being treated. There isn’t a magic pill to treat it. This is very commonly a life-long problem.
Second, there is typically confusion with the semantics. Gender and biological sex are different things. Biological sex is your genetic sex determined at conception. This is different than what society defines as masculine and feminine. And that does tend to be fluid not just from one person to another but it can change over the course of time and different cultures.
Ever hear of a “tomboy?” A girl that doesn’t dispute the fact she’s a girl but likes boys things. That’s completely normal. And it’s only logical to assume it could go the other way too where a boy may be happy as a boy, but like girl things. This is different from transgender.